8E-4 CRUISE CONTROL SYSTEM
Components and functions
Component Function
Cruise control actuator
assembly with control mod-
uleCruise control module:
Executes centralized control by means of a microcomputer over all functions
including setting a constant speed, resuming it, setting coast, limiting minimum
speed and cancelling cruise control.
Cruise control actuator (stepping motor & clutch) :
Actuates accelerator pedal through cruise cable and arm according to a signal
from cruise control module to control vehicle speed.
Cruise main switch This switch has a momentary contact type button to turn the cruise control
system ON and OFF.
SET COAST switch When this switch is rotated (ON) and then released (OFF) while vehicle is run-
ning at a speed 40 km/h (25 mile/h) or higher, vehicle speed at that OFF
moment is stored in memory and it is maintained (constant cruising).
Rotating this switch (ON) continuously during constant cruising keeps slowing
down vehicle speed as long as it is ON. When it is released (OFF), vehicle
speed at that moment is stored in memory and vehicle starts constant cruising.
ACCEL RESUME switch When this switch is rotated (ON) during constant cruising, vehicle speed keeps
increasing as long as it is ON. When it is released (OFF), vehicle speed at that
moment is stored in memory and vehicle starts constant cruising. If vehicle
speed is higher than 40 km/h (25 mile/h) after cruise control is cancelled, turn-
ing this switch ON momentarily will resume the speed at which vehicle was run-
ning before cancellation.
CANCEL switch When this switch is pressed (ON), cruise control (accelerator pedal control) is
cancelled.
Vehicle speed sensor (VSS) The vehicle speed sensor (VSS) is mounted on the transfer or transmission.
The VSS converts vehicle speed into pulse signal and send it to the cruise con-
trol module.
Stop lamp switch The stop lamp switch has 2 contact points. One contact point closes when the
brake pedal is depressed to light the stop lamp and provides a voltage signal to
the cruise control module. This signal, when inputted cancels cruise control
(sets the accelerator pedal free).
The other contact point (brake pedal position switch) opens when the brake
pedal is depressed, to shut off the power to the magnetic clutch in the actuator,
thereby cancelling cruise control (setting the accelerator pedal free).
This switch is installed to cancel cruise control (constant cruising) without fail.
Clutch pedal position switch
(M/T vehicle only)When the clutch pedal is depressed, the clutch pedal position switch closes and
provides a ground signal to cruise control module.
The cruise control module cancels cruise control (accelerator pedal control)
when this signal is inputted.
Transmission range switch
(Park/Neutral position switch)
(A/T vehicle only)When the selector lever is places in either “P” or “N” position, the transmission
range switch closes and provides a ground signal to cruise control module. The
cruise control module cancels cruise control (accelerator pedal control) when
this signal is inputted.
PCM – Throttle opening sig-
nal (4 A/T vehicle only)Throttle opening signal is inputted from PCM.
From this signal, the cruise control module detects the throttle opening and
uses it as one of the factors to output the overdrive and TCC OFF command sig-
nal to PCM.
CRUISE CONTROL SYSTEM 8E-17
Cruise Control Module and Its Circuit Inspection
VOLTAGE CHECK
Check for input or output voltage of control module (voltage between each circuit and body ground) with cruise
control module connector connected.CAUTION:
Cruise control module can not be checked by itself. It is strictly prohibited to connect voltmeter or
ohmmeter to cruise control module with coupler disconnected from it.
CIRCUIT NORMAL
VOLTAGECONDITION
Vehicle speed sensor Indicator deflection
repeated between
0 – 1 V and 3 – 5 VIgnition switch ON and cruise main switch ON. Vehicle
hoisted and rear left tire turned slowly with rear right
tire locked.
Stop lamp switch 0 – 2 V Brake pedal released.
10 – 14 V Brake pedal depressed.
Overdrive and TCC off signal
(4 A/T only) 10 – 14 V Ignition switch ON.
CRUISE indicator light 10 – 14 V Ignition switch ON.
Ground––
Brake pedal position switch
(in stop lamp switch) 10 – 14 V Ignition switch ON and brake pedal released.
0 V Ignition switch ON and brake pedal depressed.
Throttle valve opening signal
from PCM (4A/T only)Ignition switch ON.
Voltage varies as specified by graph in “THROTTLE VALVE OPENING SIG-
NAL CIRCUIT CHECK” in this section.
Cruise main switch 7 – 9V Ignition switch ON and cruise main switch released.
3 – 5 V Ignition switch ON and cruise main switch pressed.
CANCEL switch 0 – 1 V Ignition switch ON and CANCEL switch pressed.
COAST SET switch 1 – 2 V Ignition switch ON and COAST SET switch rotated.
RESUME ACCEL switch 2.5 – 4 V Ignition switch ON and RESUME ACCEL switch
rotated.
Clutch pedal position switch
(M/T only)10 – 14 V Ignition switch ON and clutch pedal released.
0 – 1 V Ignition switch ON and clutch pedal depressed fully.
Transmission range switch
(Park/Neutral position switch)
(A/T only)0 V Ignition switch ON and selector lever in “P” or “N”
range.
10 – 14 V Ignition switch ON and selector lever in “R”, “D”, “2” or
“L” range.
Cruise main switch indicator
lamp0 – 1 V Ignition switch ON.
10 – 14 V Ignition switch ON and after input main switch ON sig-
nal.
8E-20 CRUISE CONTROL SYSTEM
Coast/Set, Resume/Accel and Cancel
Switches
These switches are built in the combination switch assembly.
REMOVAL AND INSTALLATION
Refer to “COMBINATION SWITCH” in Section 3C1.
INSPECTION
1) Disable air bag system referring to “DISABLING AIR BAG
SYSTEM” in Section 10B.
2) Disconnect connector (1) of COAST/SET, RESUME/ACCEL
and CANCEL switches.
3) Check for resistance between “SW” and “GND” terminals of
disconnected switch connector (1) under each condition
below.
If check result is not satisfactory, replace combination switch
assembly.
COAST/SET, RESUME/ACCEL and CANSEL switch speci-
fication
All switches released (OFF) : Infinity
CANCEL switch pressed (ON) : About 0 Ω
ΩΩ Ω
COAST/SET switch rotated (ON) : 200 – 240 Ω
ΩΩ Ω
RESUME/ACCEL switch rotated (ON) : 820 – 1000 Ω
ΩΩ Ω
Vehicle Speed Sensor (VSS)
INSPECTION
Refer to Section 6E2.
Transmission Range Switch
Refer to Section 7B1 for inspection, removal, installation and
adjustment.CAUTION:
Never disassemble combination switch assembly. Disas-
sembly will spoil its original functions.
